The Internet of Things (IoT) has evolved using standards that are based in part on DNS design and utilize the Internet to support aspects of IoT services. The new IoT architecture currently consists of ONS (root service), EPCIS (standardized interface for data exchange) and Discovery Service (secure and selective visibility of event data). This paper puts forward an architectural approach to ONS that addresses these questions and could serve as a model for a decentralized and interoperable IoT root system. It provides a model for localized ONS that could support a multiplicity of IoT networks and further clarifies the respective functions of Discovery Services.